Benjamin w



(No Model.)

- B. W. GRIST.

THROTTLE VALVE.

Patented Jan. 4, 1898. w

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BENJAMIN GRIST, OF PHILADELPHIA, PENNSYLVANIA, ASSIGNOR TO THE PENNSYLVANIA IRON WORKS COMPANY, OF SAME PLACE.

TH ROTTLE-VALVE.

SPECIFICATION forming part of Letters Patent No. 596,871, dated January 4, 1898.

Application filed September 22, 1897. Serial No. 652,618. (No model.)

To ctZZ whom it may concern:

Be it knownthat I, BENJAMIN W. GRIsT, a citizen of the United States, residing at Philadelphia, in the county of Philadelphia and State of Pennsylvania, have invented certain new and useful Improvements in Throttle Valves for Gas or other Engines; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention relates to engines, has especial reference to marine engines, has for its object a throttle-valve for supplying the motor-fluid, and it consists in certain improvements in construction whereby the valve can be set in position with certainty, as will be hereinafter described and claimed.

In the accompanying drawings, which form part of this specification, Figure 1 represents a top plan view, the valve being open to its full extent; Fig. 2, a horizontal section showing the valve in the same position; Fig. 3, a top plan view, the valve being slightly open to effect the minimum speed of an engine; Fig. 4%, a horizontal section showing the valve in. the same position; Fig. 5, a top plan view, the valve being closed; .Fig. 6, a horizontal section showing the valve in the same position,'and Fig. 7a vertical section showing the valve open to its full extent.

Reference being had to the drawings and the letters thereon, A indicates the body of the valve; B, the valve, which is an ordinary turning-plu g valve, and O the operating-lever.

The body A is provided with an inlet a, an outlet Z), and ports 0 c, and the valve B with ports d cl, which register with the ports a c.

On the upper end of the body is an annular flange e, to which a segmental dial D is attached. The dial is provided with a pro jection f at its edge g, which forms a stop for the valve when it is open to its full extent, as shown in Figs. 1 and '2, a projection h, which forms a stop for the valve when slightly or partially open to efiect minimum speed of an engine, as shown in Figs. 3 and 4, and a projection 't', which forms a stop for the valve when closed, as shown in Figs. 5 and 6, and the outer edge of the dial is graduated between the stops f and It to indicate the degrees of valve-opening between the partial open and the full-open positions.

On the neck of the valve 13 a lever G is secured by a screw is, engaging the end of the neck, and the head Zof the screw overlapping the hub m of the lever. On the inner end of the lever is a pointer n, and immediately in rear of the pointer an opening 0 is formed, and on the upper surface of the lever in rear of the hub in lugs 19 p are formed.

E indicates a lever provided at its forward end with a vertical projection g, which projects through the opening 0 and engages the projections or stops f, h, and ion the dial. The lever E is pivotally secured between the lugs 13 p by a pin r and is held normally elevated by a spring 8 to push the projection (1 down into engagement with the face of the dial D to strike the several stops as the lever C is pushed to manipulate the valve B.

When the engine is running at its minimum speed with the valve partially open, as shown in Figs. 3 and 4, and it is desired to shut oh? the speed or fluid to the motor, the lever G is seized, the lever E pressed down, the projection q raised out of engagement with the end of the stop it to the top or face thereof, and the lever C pushed to move the pointer toward the stop '1' until the projection q strikes against it, or, if it is desired to increase the supply of motor-fluid and the speed of the engine, the lever C is moved in the opposite direction.

Having thus fully described my invention, what I claim isl. A throttle-valve, provided with a turning-plug valve, a lever connected to said plug and provided with a pointer or extension in front of its hub, in combination with a dial provided with a stop to set thevalve partially open, a stop to set it entirely open and a stop to set it closed.

2. A throttle-valve provided with a dial having stops thereon to set the valve open, partially open and closed, in combination with an operatinglever provided with means to engage said stops.

3. A throttle-valve provided with a dial having stops projecting from the surface thereof to set the valve open, partially open and closed, in combination with an operating-lever provided with a spring-actuated lelever pivotally secured thereto and having a ver having a projection to engage said stops. projection extending through the opening in e. A throttle-valve provided with a dial sethe operating-lever and engaging the projeccured to the body of the valve and provided tions on the dial. I 5 with projections on the face thereof to stop In testimony whereof I affix my signature :5

the valve when open, partially open and in presence of two Witnesses. closed, in combination With. an operating-1e- BENJAMIN W. GRIST. ver secured to the neck of the valve and pro- WVitnesses: vided with an opening through the lever in EDWIN A. MOORE,

10 front of its hub and with a spring-actuated CHAS. DIOKERMAN. 

